The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2015
Filed:
Sep. 14, 2012
Donald J. Butts, Milford, CT (US);
William A. Welsh, North Haven, CT (US);
Thomas A. Millott, Milford, CT (US);
Stuart K. Drost, Shelton, CT (US);
Donald J. Butts, Milford, CT (US);
William A. Welsh, North Haven, CT (US);
Thomas A. Millott, Milford, CT (US);
Stuart K. Drost, Shelton, CT (US);
SIKORSKY AIRCRAFT CORPORATION, Stratford, CT (US);
Abstract
A noise-suppression assembly of a mechanical drive system having a rotational frequency includes an audio filter unit configured to receive a first audio signal and a timing signal of the mechanical drive system. The audio filter unit generates a noise-cancellation signal based on a frequency of the timing signal to suppress a noise generated by the mechanical drive system and to apply the noise-cancellation signal to the first audio signal to produce a filtered first audio signal. The frequency of the timing signal is based on the rotational frequency of the mechanical drive system.